Nutritional yeast has long been a favorite of vegans, who use it as a cheese substitute. But now nutritional yeast is everywhere—maybe you’ve seen it in the market, or on a food blog. Here’s what you need to know about the popular seasoning.

It’s simply deactivated yeast—similar to the kind in your bread or beer.

To make the seasoning, manufacturers feed the yeast sugar, to make them grow and flourish. Then they kill (or deactivate) the yeast by heating them. Finally, they dry the deactivated yeast and fortify it with vitamins and minerals. That’s it.

It’s fairly nutritious.

You can use it the same way you’d use Parmesan.

Nutritional yeast is a super useful seasoning for vegan or dairy-free diets: It’s fantastic sprinkled on popcorn or nachos, or over roasted vegetables or salads. You can use it to make vegan pastas taste cheesy. But it’s good in non-vegan dishes too—as a flavoring in breadcrumbs for crispy chicken or fish, for instance.